What to Eat on a GLP-1 (Wegovy, Zepbound): Food Guide

By the Weight Loss 4 Wellness editorial team · Updated November 2, 2026 · How we research

GLP-1-based medicines such as semaglutide (Wegovy) and tirzepatide (Zepbound) turn down appetite, so many people simply eat much less. That makes what you eat more important: you need enough protein, fiber, fluid and nutrients from smaller portions. This guide covers the eating basics leading medical societies emphasize. It is not a substitute for your prescriber’s advice.

Key takeaways

Leading obesity and nutrition societies say GLP-1 treatment works best alongside nutrient-dense eating, enough protein and strength training.
Build smaller meals around protein first, then vegetables and fiber.
Eat slowly and stop at the first sign of fullness. Large, greasy or very sweet meals often worsen nausea.
Sip fluids through the day, and add fiber gradually to help with constipation.
Never change your dose on your own. Call your prescriber about side effects that don’t improve.

How GLP-1 medicines affect eating

These medicines mimic gut hormones that signal fullness and slow how quickly the stomach empties. MedlinePlus, the NIH’s drug information service, lists nausea, vomiting, diarrhea and constipation among the common side effects of semaglutide, and they tend to be most noticeable when starting or increasing a dose. Because appetite drops, it is easy to fall short on protein and nutrients without noticing.

In 2025, four groups (the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association and The Obesity Society) published a joint advisory on nutrition during GLP-1 therapy. Its priorities include nutrient-dense, minimally processed diets; adequate protein plus strength training to preserve lean mass; managing digestive side effects; and preventing micronutrient deficiencies.

Build your plate: protein first

When you can only eat a little, start with the protein on your plate. Easy, gentle options include:

Greek yogurt, cottage cheese or skyr
Eggs, egg whites or a tofu scramble
Baked or poached fish, chicken or turkey
Lentil soup, beans or edamame
Protein shakes or high-protein milk when solid food is hard

Your prescriber or a registered dietitian can give you a daily protein target. Our general guide to how much protein to eat while losing weight explains the ranges used in research, and the protein calculator splits a target across meals.

Then add fiber, slowly

Vegetables, fruit, oats, beans and whole grains help with fullness and regularity. Constipation is common on GLP-1s, but adding a lot of fiber all at once can cause bloating, so increase gradually and drink more fluid as you do.

Drink enough

Reduced appetite often means reduced drinking, and vomiting or diarrhea raise fluid losses. Keep a water bottle in sight and sip through the day. As a general reference, the National Academies set total water intake (from food and drinks) at about 2.7 liters a day for women and 3.7 liters for men; your needs may differ. Seek care if you can’t keep fluids down.

Foods that often make nausea worse

Large portions or eating quickly
Fried, greasy or very rich foods
Very sugary foods and drinks
Carbonated drinks (for some people)
Alcohol
Lying down soon after eating

Bland, cool or room-temperature foods and smaller, more frequent meals are often easier on the stomach.

A sample day (small portions)

Meal	Example
Breakfast	¾ cup Greek yogurt with berries and a spoon of chia
Lunch	Half a turkey and avocado wrap with cucumber slices
Snack	Cheese stick or a small protein shake
Dinner	Baked salmon, a few roasted vegetables, ½ cup brown rice

Don’t skip strength training

Rapid weight loss can include loss of muscle. Pairing enough protein with resistance exercise at least twice a week is one of the advisory’s core recommendations. Our exercise guides include beginner-friendly options.

About compounded and online GLP-1s

The FDA has warned consumers about unapproved GLP-1 products, including some sold online, and about dosing errors with compounded versions. Use medicines prescribed by a licensed clinician and dispensed by a licensed pharmacy, and read the FDA’s guidance before buying.

When to call your prescriber

Contact your prescriber about nausea, vomiting, diarrhea or constipation that doesn’t improve, signs of dehydration (dizziness, very dark urine), or difficulty eating enough. Call your doctor right away about ongoing pain in the upper or middle stomach that may spread to the back, or any severe stomach problem; these can signal a serious side effect.

Frequently asked questions

What should I eat when I feel nauseous on a GLP-1?

Try small portions of bland, low-fat foods such as crackers, toast, rice, bananas, yogurt or broth-based soups, sip fluids slowly, and avoid lying down right after eating. Tell your prescriber if nausea persists.

Do I need to count calories on a GLP-1?

Many people do not need to, because appetite is lower. Paying attention to protein, fiber and fluids is usually more useful. Follow your care team’s guidance.

Can I follow a “GLP-1 diet” without the medication?

Eating patterns built around protein, fiber and minimally processed foods support weight loss for anyone, but food does not replicate the effects of the medicine. See our calorie deficit guide for a non-medication approach.

What to Eat on a GLP-1 Medication: Protein, Fiber, Fluids and Managing Nausea